KR100243352B1 - 주파수 합성기용 동기 검출회로 - Google Patents
주파수 합성기용 동기 검출회로 Download PDFInfo
- Publication number
- KR100243352B1 KR100243352B1 KR1019970071625A KR19970071625A KR100243352B1 KR 100243352 B1 KR100243352 B1 KR 100243352B1 KR 1019970071625 A KR1019970071625 A KR 1019970071625A KR 19970071625 A KR19970071625 A KR 19970071625A KR 100243352 B1 KR100243352 B1 KR 100243352B1
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- circuit
- frequency
- delay circuit
- inputting
- Prior art date
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- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000010295 mobile communication Methods 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 abstract description 16
- 238000004891 communication Methods 0.000 abstract description 7
- 230000002194 synthesizing effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 230000001934 delay Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0008—Synchronisation information channels, e.g. clock distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
Claims (2)
- 이동 통신 주파수 합성기에서 빠른 동기 시간을 갖는 구간과 낮은 위상 잡음을 갖도록하기 위해 주파수 동기 상태를 검출하는 동기 검출회로에 있어서,주파수 합성부(100)에서 발생한 주파수 신호를 입력하여 지연시켜 출력하는 지연회로(201)와;상기 지연회로(201)로부터 출력된 신호를 반전시켜 출력하는 인버터(302)와;상기 인버터(302)로부터 출력된 신호와 주파수 합성부(100)에서 발생한 주파수 신호를 입력하여 논리곱하여 출력하는 AND 게이트(203)와;기준 주파수 신호를 입력하여 상기 지연회로(201)보다 1/2*D(D : 지연회로(201)의 지연시간)만큼 적은 지연시간으로 지연시켜 출력하는 1/2 지연회로(204)와;상기 1/2 지연회로(204)의 출력 신호를 클럭 신호로 입력하고, 상기 AND 게이트(203)의 출력 신호를 입력하여 지연시켜 출력하는 D 플립플롭(205)과;상기 D 플립플롭(205)이 로직 하이 상태인지를 판별하고 전압을 생성하는 아날로그 적분 회로(210)와;상기 아날로그 적분 회로(210)에서 생성한 전압에 위/아래 문턱 전압을 두어 잡음에 영향이 적은 최종 출력 디지털 로직을 발생시키는 히스테리시스 게이트(206)로 구성된 것을 특징으로 하는 주파수 합성기용 동기 검출회로.
- 제 1 항에 있어서,상기 아날로그 적분 회로(210)는, 상기 D 플립플롭(205)의 출력 신호가 하이일 경우에는 오프되고, 로우일 경우에는 온되는 트랜지스터(211)와;아날로그 적분 회로(210)에 전류를 공급하는 전류원(212)과;상기 트랜지스터(211)가 온되면 충전하고, 트랜지스터(211)가 오프되면 방전하는 캐패시터(213)로 구성된 것을 특징으로 하는 주파수 합성기용 동기 검출회로.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970071625A KR100243352B1 (ko) | 1997-12-22 | 1997-12-22 | 주파수 합성기용 동기 검출회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970071625A KR100243352B1 (ko) | 1997-12-22 | 1997-12-22 | 주파수 합성기용 동기 검출회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR19990052176A KR19990052176A (ko) | 1999-07-05 |
KR100243352B1 true KR100243352B1 (ko) | 2000-02-01 |
Family
ID=19528083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019970071625A KR100243352B1 (ko) | 1997-12-22 | 1997-12-22 | 주파수 합성기용 동기 검출회로 |
Country Status (1)
Country | Link |
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KR (1) | KR100243352B1 (ko) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100849780B1 (ko) * | 2006-10-27 | 2008-07-31 | 삼성전기주식회사 | 적분기를 이용한 디지털 위상 잡음 측정 장치 |
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1997
- 1997-12-22 KR KR1019970071625A patent/KR100243352B1/ko not_active IP Right Cessation
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Publication number | Publication date |
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KR19990052176A (ko) | 1999-07-05 |
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